fmt.c revision 41580 
1/*-
2 * Copyright (c) 1992, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35#if 0
36static char sccsid[] = "@(#)fmt.c	8.4 (Berkeley) 4/15/94";
37#endif
38static const char rcsid[] =
39	"$Id: fmt.c,v 1.12 1998/06/17 11:33:10 jkoshy Exp $";
40#endif /* not lint */
41
42#include <sys/types.h>
43#include <sys/time.h>
44#include <sys/resource.h>
45#include <err.h>
46#include <stdio.h>
47#include <stdlib.h>
48#include <string.h>
49#include <unistd.h>
50#include <vis.h>
51#include "ps.h"
52
53static char *cmdpart __P((char *));
54static char *shquote __P((char **));
55
56/*
57 * XXX
58 * This is a stub until marc does the real one.
59 */
60static char *
61shquote(argv)
62	char **argv;
63{
64	long arg_max;
65	char **p, *dst, *src;
66	static char *buf = NULL;
67
68	if (buf == NULL) {
69		if ((arg_max = sysconf(_SC_ARG_MAX)) == -1)
70			errx(1, "sysconf _SC_ARG_MAX failed");
71		if ((buf = malloc((4 * arg_max)  +  1)) == NULL)
72			errx(1, "malloc failed");
73	}
74
75	if (*argv == 0) {
76		buf[0] = 0;
77		return (buf);
78	}
79	dst = buf;
80	for (p = argv; (src = *p++) != 0; ) {
81		if (*src == 0)
82			continue;
83		strvis(dst, src, VIS_NL | VIS_CSTYLE);
84		while (*dst)
85			dst++;
86		*dst++ = ' ';
87	}
88	/* Chop off trailing space */
89	if (dst != buf)
90		dst--;
91	*dst = '\0';
92	return (buf);
93}
94
95static char *
96cmdpart(arg0)
97	char *arg0;
98{
99	char *cp;
100
101	return ((cp = strrchr(arg0, '/')) != NULL ? cp + 1 : arg0);
102}
103
104char *
105fmt_argv(argv, cmd, maxlen)
106	char **argv;
107	char *cmd;
108	int maxlen;
109{
110	int len;
111	char *ap, *cp;
112
113	if (argv == 0 || argv[0] == 0) {
114		if (cmd == NULL)
115			return ("");
116		ap = NULL;
117		len = maxlen + 3;
118	} else {
119		ap = shquote(argv);
120		len = strlen(ap) + maxlen + 4;
121	}
122	if ((cp = malloc(len)) == NULL)
123		return (NULL);
124	if (ap == NULL)
125		sprintf(cp, " (%.*s)", maxlen, cmd);
126	else if (strncmp(cmdpart(argv[0]), cmd, maxlen) != 0)
127		sprintf(cp, "%s (%.*s)", ap, maxlen, cmd);
128	else
129		(void) strcpy(cp, ap);
130	return (cp);
131}
132